On the Quebec side of the river:Palais GomméTi-MousseDomaine de L'Ange-GardienCabane a sucre Brazeauand a few others are fairly close to Ottawa, franco style, all-you-can-eat at around $15.00 per person.

As far as I know, all of these are open only during the maple sap season (approximately mid-late February to late April). I know of one that is open year-round. It is Sucrerie de la Montagne, a franco cabane in Rigaud, Quebec, a bit over an hour from Ottawa, on the way to Montreal. In season, their meal is a bit more expnsive ($23.00 per person). Outside the season, their lunch is $30.00 per person and supper is $40.00 per person.